Taxes on Income (Loss) (Schedule of Total Provision for Taxes on Income) (Details) - USD ($) $ in Millions	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal													$ 1	$ (7)	$ 19
Foreign													45	60	32
State and local													8	21	39
Total current													54	74	90
Deferred:
Federal													(17)	223	119
Foreign													9	16	12
State and local													16	16	(21)
Total deferred													8	255	110
Total provision	$ (50)	$ 54	$ 50	$ 8	$ 56	$ 128	$ 86	$ 59	$ 58	$ 145	$ 112	$ 272	$ 62	$ 329	$ 200